<?xml version="1.0"?>
<svg xmlns="http://www.w3.org/2000/svg" width="750">
  <defs>
    <filter id="filter">
      <!-- <boolean> (preserveAlpha) -->
      <!-- <enum> (edgeMode) -->
      <!-- <number> (divisor) -->
      <!-- <integer> (targetX) -->
      <!-- <integer-optional-integer> (order) -->
      <!-- <string> (result) -->
      <feConvolveMatrix id="convolve"/>
      <!-- <number-optional-number> (stdDeviation) -->
      <feGaussianBlur id="blur"/>
    </filter>
    <!-- <angle> (orient) -->
    <!-- <length> (markerWidth) -->
    <!-- <preserveAspectRatio> (preserveAspectRatio) -->
    <marker id="marker"/>
  </defs>
</svg>
